Imprints of gravitational lensing in the Planck cosmic microwave background data at the location of $WISE\times \mathrm{SCOS}$ galaxies

Journal Article · 01 August 2018 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.98.043506 · OSTI ID:1544234

Raghunathan, Srinivasan ^[1]; Bianchini, Federico ^[1]; Reichardt, Christian L. ^[1]

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1. Univ. of Melbourne (Australia). School of Physics

We detect weak gravitational lensing of the cosmic microwave background at the location of the WISE × SuperCOSMOS (WISE × SCOS) galaxies using the publicly available Planck lensing convergence map. By stacking the lensing convergence map at the position of 12.4 million galaxies in the redshift range 0.1 ≤ $$\mathscr{z}$$ ≤ 0.345, we find the average mass of the galaxies to be $$M_{200_{crit}}$$ = 6.25 ± 0.6 × 10¹² M$$_⊙$$. The null hypothesis of no lensing is rejected at a significance of 17$$σ$$ . We split the galaxy sample into three redshift slices, each containing ~4.1 million objects, and obtain lensing masses in each slice of 4.18 ± 0.8, 6.93 ± 0.9, and 18.84 ± 1.2 × 10¹² M$$_⊙$$. Our results suggest a redshift evolution of the galaxy sample masses, but this apparent increase might be due to the preferential selection of intrinsically luminous sources at high redshifts. The recovered mass of the stacked sample is reduced by 28% when we remove the galaxies in the vicinity of galaxy clusters with mass $$M_{200_{crit}}$$ = 2 × 10 14 M_⊙. We forecast that upcoming CMB surveys can achieve 5% galaxy mass constraints over sets of 12.4 million galaxies with $$M_{200_{crit}}$$ = 1 × 10¹² M_⊙ at $$z$$ = 1 .

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1544234
• Journal Information: Physical Review D, Journal Name: Physical Review D Journal Issue: 4 Vol. 98; ISSN PRVDAQ; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English